|The Ronin Gear all metal practice butterfly knife with rounded dull blade (cannot be sharpened!) that is ideal for safe training! Plus! Pananandata Balisong book by Amante Marinas This rare, out of print book on the filipino balisong features one & two hand openings, hand transfers; pin end and latch end holds; finger rolls; handle transfers, aerials and more! CAUTION: Always train under proper supervision. NOT designed for contact training!